Muscles of the Pectoral Girdle & Upper Limb (Lab)

Question 1

Answer 1

Trapezius

O: thoracic and cervical vertebrae; occipital bone
I: Spine of scapula; clavicle
A: - Superior Fibers of Trapezius: elevate and rotate scapula
- Middle Fibers of Trapezius: retract scapula
- Inferior Fibers of Trapezius: depress scapula

Question 2

Answer 2

Rhomboideus
1. Rhomboid Minor
2. Rhomboid Major

O: Cervical and Thoracic vertebrae
I: Medial border of scapula
A: retract scapula

Question 3

Answer 3

Rhomboideus

O: Cervical and Thoracic vertebrae
I: Medial border of scapula
A: retract scapula

Question 4

Answer 4

Supraspinatus

O: Supraspinous fossa of scapula
I: Greater tubercle of humerus
A: Stabilize humerus

Question 5

Answer 5

Supraspinatus

O: Supraspinous fossa of scapula
I: Greater tubercle of humerus
A: Stabilize humerus

Question 6

Answer 6

Infraspinatus

O: Infraspinous fossa of scapula
I: Greater tubercle of humerus
A: Stabilizes Humerus

Question 7

Answer 7

Infraspinatus

O: Infraspinous fossa of scapula
I: Greater tubercle of humerus
A: Stabilizes Humerus

Question 8

Answer 8

Teres Minor

O: Lateral border of scapula
I: Greater tubercle of humerus
A: Stabilizes humerus; rotate shoulder laterally

Question 9

Answer 9

Subscapularis

O: subscapular fossa of scapula
I: Lesser tubercle of humerus
A: Stabilizes humerus; rotates shoulder medially

Question 10

Answer 10

Subscapularis

O: subscapular fossa of scapula
I: Lesser tubercle of humerus
A: Stabilizes humerus; rotates shoulder medially

Question 11

Answer 11

Teres Major

O: Scapula
I: Lesser tubercle of humerus
A: Extend shoulder; adduct shoulder

Question 12

Answer 12

Teres Major

O: Scapula
I: Lesser tubercle of humerus
A: Extend shoulder; adduct shoulder

Question 13

Answer 13

Pectoralis Major

O: sternum; upper costal cartilages
I: intertubercular groove of humerus
A: flex shoulder; adduct shoulder

Question 14

Answer 14

Pectoralis Major

O: sternum; upper costal cartilages
I: intertubercular groove of humerus
A: flex shoulder; adduct shoulder

Question 15

Answer 15

Pectoralis Minor

O: ribs 3,4,5
I: Coracoid process of scapula
A: protract scapula; depress scapula

Question 16

Answer 16

Pectoralis Minor

O: ribs 3,4,5
I: Coracoid process of the scapula
A: protract scapula; depress scapula

Question 17

Answer 17

Serratus Anterior

O: Ribs 1-8
I: Medial Border of Scapula
A: Protract scapula

Question 18

Answer 18

Serratus Anterior

O: Ribs 1-8
I: Medial Border of Scapula
A: Protract scapula

Question 19

Answer 19

Latissimus Dorsi

O: Thoracic and lumbar vertebrae
I: Intertubercular groove of humerus
A: Extends shoulder (primary mover)

Question 20

Answer 20

Latissimus Dorsi

O: Thoracic and lumbar vertebrae
I: Intertubercular groove of humerus
A: Extends shoulder (primary mover)

Question 21

Answer 21

Deltoid
1. Anterior fibers
2. Middle fibers
3. Posterior fibers

O: Clavicle; Spine of scapula
I: Deltoid tuberosity of humerus
A: - Anterior fibers: flex and medially rotate shoulder
- Middle fibers: shoulder abduction
- posterior fibers: extend and laterally rotate shoulder

Question 22

Answer 22

Deltoid

O: Clavicle; Spine of scapula
I: Deltoid tuberosity of humerus
A: - Anterior fibers: flex and medially rotate shoulder
- Middle fibers: shoulder abduction
- posterior fibers: extend and laterally rotate shoulder

Question 23

Answer 23

Triceps Brachii

O: Humerus; scapula
I: olecranon process; ulna
A: Extends elbow

Question 24

Answer 24

Triceps Brachii

O: Humerus; scapula
I: olecranon process; ulna
A: Extends elbow

Question 25

Answer 25

Biceps Brachii O: Scapula I: Radial tuberosity of the radius A: flexes the elbow

Question 26

Answer 26

Biceps Brachii O: Scapula I: Radial tuberosity of the radius A: flexes the elbow

Question 27

Answer 27

Brachialis O: Humerus I: Coronoid process of ulna A: Flexes elbow

Question 28

Answer 28

Brachioradialis O: Humerus I: Styloid process; radius A: Flexes Elbow

Question 29

Answer 29

Brachioradialis O: Humerus I: Styloid process; radius A: Flexes Elbow

Question 30

Answer 30

Pronator Teres O: Ulna I: Radius A: Pronates forearm

Question 31

Answer 31

Pronator Teres O: Ulna I: Radius A: Pronates forearm

Question 32

Answer 32

Flexor Carpi Radialis O: Medial epicondyle; humerus I: Base of metacarpals A: Flex/abduct wrist

Question 33

Answer 33

Flexor Carpi Radialis O: Medial epicondyle; humerus I: Base of metacarpals A: Flex/abduct wrist

Question 34

Answer 34

Palmaris Longus O: Medial epicondyle; Humerus I: Palmar aponeurosis A: Flexes wrist ( weakly)

Question 35

Answer 35

Palmaris Longus O: Medial epicondyle; Humerus I: Palmar aponeurosis A: Flexes wrist ( weakly)

Question 36

Answer 36

Flexor Carpi Ulnaris O: Medial Epicondyle; humerus I: Base of metacarpal V A: Flexes wrist; adducts wrist

Question 37

Answer 37

Flexor Carpi Ulnaris O: Medial Epicondyle; humerus I: Base of metacarpal V A: Flexes wrist; adducts wrist

Question 38

Answer 38

Flexor Digitorum Superficialis O: Medial epicondyle; humerus I: Middle phalanges of digits A: flex fingers

Question 39

Answer 39

Flexor Digitorum Superficialis O: Medial epicondyle; humerus I: Middle phalanges of digits A: flex fingers

Question 40

Answer 40

Extensor Carpi Radialis 1. Extensor Carpi Radialis Longus 2. Extensor Carpi Radialis Brevis O: Lateral Epicondyle; Humerus I: Base metacarpal II A: Extend/abduct wrist

Question 41

Answer 41

Extensor Carpi Radialis O: Lateral Epicondyle; Humerus I: Base metacarpal II A: Extend/abduct wrist

Question 42

Answer 42

Extensor Digitorum O: Lateral Epicondyle; Humerus I: Distal phalanges of fingers A: Extend fingers

Question 43

Answer 43

Extensor Digitorum O: Lateral Epicondyle; Humerus I: Distal phalanges of fingers A: Extend fingers

Question 44

Answer 44

Extensor Carpi Ulnaris O: Lateral epicondyle; humerus I: base of metacarpal V A: Extend wrist; adduct wrist

Question 45

Answer 45

Extensor Carpi Ulnaris O: Lateral epicondyle; humerus I: base of metacarpal V A: Extend wrist; adduct wrist

Question 46

Answer 46

Flexor Retinaculum

Question 47

Answer 47

Palmar aponeurosis

Question 48

Answer 48

Thenar Muscles A: flex/adduct thumb Group of four muscles

Question 49

Answer 49

Palmar Muscles (group of 3 muscles) A: abduct/flex fingers

Question 50

Answer 50

Trapezius O: thoracic and cervical vertebrae; occipital bone I: Spine of scapula; clavicle A: - Superior Fibers of Trapezius: elevate and rotate scapula - Middle Fibers of Trapezius: retract scapula - Inferior Fibers of Trapezius: depress scapula

Question 51

Answer 51

1. Superior fibers of trapezius 2. Middle fibers of trapezius 3. Inferior fibers of trapezius